test: address 3.11/3.14 coverage instrumentation quirks

3.14: nested async-with arc misreporting on three create_task_group lines
(the documented AGENTS.md case) — pragma: no branch.

3.11: lines after async-CM exit with pytest.raises mis-traced in one test —
moved the asserts inside the context manager.

Author: maxisbey

tests/shared/test_dispatcher.py

@@ -208,8 +208,8 @@ async def on_request(
     async with running_pair(direct_pair, server_on_request=on_request) as (client, *_):
         with anyio.fail_after(5), pytest.raises(MCPError) as exc:
             await client.send_raw_request("tools/list", {})
-    assert exc.value.error.code == INTERNAL_ERROR
-    assert isinstance(exc.value.__cause__, ValueError)
+        assert exc.value.error.code == INTERNAL_ERROR
+        assert isinstance(exc.value.__cause__, ValueError)
 
 
 @pytest.mark.anyio

tests/shared/test_jsonrpc_dispatcher.py

@@ -56,7 +56,7 @@ async def call(method: str) -> None:
             results[method] = await client.send_request(method, None)
 
         with anyio.fail_after(5):
-            async with anyio.create_task_group() as tg:
+            async with anyio.create_task_group() as tg:  # pragma: no branch
                 tg.start_soon(call, "first")
                 await anyio.sleep(0)
                 tg.start_soon(call, "second")
@@ -99,7 +99,7 @@ async def server_on_request(ctx: DCtx, method: str, params: Mapping[str, Any] |
 
     async with running_pair(jsonrpc_pair, server_on_request=server_on_request) as (client, *_):
         with anyio.fail_after(5):
-            async with anyio.create_task_group() as tg:
+            async with anyio.create_task_group() as tg:  # pragma: no branch
 
                 async def call_then_record() -> None:
                     with pytest.raises(MCPError):  # we'll cancel via tg below
@@ -137,7 +137,7 @@ def factory(*, can_send_request: bool = True):
     result_box: list[dict[str, Any]] = []
     async with running_pair(factory, server_on_request=server_on_request) as (client, *_):
         with anyio.fail_after(5):
-            async with anyio.create_task_group() as tg:
+            async with anyio.create_task_group() as tg:  # pragma: no branch
 
                 async def call() -> None:
                     result_box.append(await client.send_request("slow", None))